We know she's out to save the world (and save the dolphin), but how does Heroes actress Hayden Panettiere match up in a fashion face-off against Jane Seymour?

Hayden dazzled in this hot turquoise Dina Bar-El in September at a Declare Yourself event, while the Dancing with the Stars contender and former Dr. Quinn: Medicine Woman showed off her fit figure in a satin sheath at a movie premiere recently.

Hayden Panettiere vs. Jane Seymour: It's a difficult battle. Which star would you rather ... see in this dress at a formal affair? You tell us, celebrity fashion fans.